Not to mention much, I have seen where things went very well on demo accounts but the real experience will say otherwise. As funny as it may sound, it's real. The only genuine thing about the demo version is that it helps gamblers to familiarise with the site condition and functionality. Though it's a great feature needed in every casino to help newbies familiarise with the site.
The issue of signature campaign is necessary to enhance publicity for any start up in the company. If they actually have fund for it, they will have to consider it
Anyways what you said is possible some casino demos may outrightly outplay the real version, but then not every casino has the patients to run the demo version on the casino. But again the platform is faced with some bugs that need to be fixed but from their bonus system it looks good, at least one can use the bonus to try out the site, on the issue of signatures and campaign may be in the future the team may consider a signature as part of their marketing strategy, but until then let us concentrate more on the functionality of the casino.